Travel Related Buttons are not woking

Hi All,

We upgrade the system NW 7.0 to NW 7.4 at that time travel and management application is outdated

Now we have activate the  business functions and create the new webdynpro ABAP iviews

when we click on MY trips and expenses view we able to saw the work items.we select the work item if i click any button is not working  and  all above buttons (Display / Change / Modify / delete / create new travel request ) are not working

Please suggest me if anything missing in my configuration

and already assigned the below role to users

pcd:portal_content/every_user/general/eu_core_role.

Regards

Raju